Multipurpose sun shielding apparatus

ABSTRACT

Provided is a multi-purpose shading device with a multi-stage collapsible blind part, in which the blind part is rotatably configured so as to function as a shutter and an advertising board when it is rotated downwardly and to function as a signboard when it is rotated upwardly. The multi-purpose shading device including a blind part which is provide with a plurality of blind plates and formed into a multi-stage type so that a rear side blind plate is guided to a fore-end side blind plate so as to be extended or collapsed along the fore-end side blind part; a driving part which extends or collapse the blind part; a rotational part which rotates the blind part; and a control part which controls the driving part and rotational part.

CROSS-REFERENCE(S) TO RELATED APPLICATIONS

The present invention claims priority of Korean Patent Application No.10-2011-0094922, filed on Sep. 9, 2011, which is incorporated herein byreference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a multi-purpose shading device, andmore particularly to a multi-purpose shading device with a multi-stagecollapsible blind part, in which the blind part is rotatably configuredso as to function as a shutter and an advertising board when it isrotated downwardly and to function as a signboard when it is rotatedupwardly.

2. Description of Related Art

In general, a shading device for shielding the sun and shutting out therain is installed at a front door, a bicycle rack, a stair, a faucet orthe like. The shading device functions to shield people entering abuilding and various articles displayed in the show window fromsunlight. Further, the shading device allows a space of terrace to bemore widely used. At the same time, the shading device gives salience toa visual image of a building or a store, thereby enhancing interioreffect. Furthermore, the shading device provides outdoor places forrelaxation or snack bar to visitors.

A conventional shading device is typically classified into a foldingtype and a fixed type. In case of the folding type, fabric or syntheticresin film is used, and its unfolded level can be adjusted manually orautomatically. And in case of the fixed type, a fixed frame is providedat a wall or the like, and then a tent is installed thereon. Thus, thefixed type can cover only a fixed range at a fixed position.

Meanwhile, a shutter that is a kind of wall or door is a disasterprevention facility for preventing or minimizing loss of life andproperty due to robbery, fire or the like. The shutter formed ofconnected pipes or slates is moved up and down along a guide railinstalled at both sides thereof. And the shutter is configured to bewound on a roller that is rotated by a driving means, and thus it can bemoved up and down. A main body of the shutter has to be designed with avolume of the shutter to be wound by the roller. Therefore, it has asizable volume, and thus a large-sized structure is installed at a wallof a building. Moreover, in order to minimize exposure of the main bodywith consideration for the external appearance, the structure of a wallof a building has to be changed.

Further, various signboards for advertising purposes are installed at anouter wall of a building. In case that an awning screen is provided,there is a problem in that the signboards are covered with the awningscreen. Accordingly, the awning screen, signboard and shutter have to beprovided separately.

Moreover, the awning screen is mainly used in the daytime, but theshutter is mostly used at nighttime after business hours. Therefore, theawning screen and shutter are respectively used at different times. Thatis, while the awning screen performs its own function, the shutter is inthe state of being opened, and while shutter is in the state of beingclosed, the shutter loses its own function. Therefore, there is noredundancy effect due to a double installation of the awning screen andshutter.

SUMMARY OF THE INVENTION

An embodiment of the present invention is directed to providing amulti-purpose shading device with a multi-stage collapsible blind part,in which the blind part is rotatably configured so as to function as ashutter and an advertising board when it is rotated downwardly and tofunction as a signboard when it is rotated upwardly.

To achieve the object of the present invention, the present inventionprovides a multi-purpose shading device including a blind part which isprovide with a plurality of blind plates and formed into a multi-stagetype so that a rear side blind plate is guided to a fore-end side blindplate so as to be extended or collapsed along the fore-end side blindpart; a driving part which extends or collapse the blind part; arotational part which rotates the blind part; and a control part whichcontrols the driving part and rotational part.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a view showing the configuration of a multi-purpose shadingdevice according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the multi-purpose shadingdevice according to the embodiment of the present invention.

FIG. 3 is a front view of the multi-purpose shading device according tothe embodiment of the present invention.

FIG. 4 is an exploded perspective view of a multi-purpose shading deviceaccording to another embodiment of the present invention.

FIG. 5 is a front view of a multi-purpose shading device according toyet another embodiment of the present invention.

FIG. 6 is a view showing the operation of the multi-purpose shadingdevice according to the embodiment of the present invention.

FIG. 7 is a perspective view in the case that the multi-purpose shadingdevice of the present invention is used as a signboard.

FIGS. 8 a and 8 b are a side view and a cross-sectional view of a blindpart and a driving part according to one embodiment of the presentinvention.

FIG. 9 is a side view showing the operation in FIG. 3.

[Detailed Description of Main Elements] 100: blind part 110, 150: firstblind plate 111, 151: 1-1^(st) surface 112, 152: 1-2^(nd) surface 120,160: second blind plate 122, 162: 2-2^(nd) surface 130, 170: third blindplate 132, 172: 3-2^(nd) surface 155: first roller 165: second roller166: third roller 175: fourth roller 181: runner 182: rail 200: drivingpart 210: driving motor 211, 321: driving gear 212, 322: driven gear220: rack 221: pinion 230, 240: collapsible supporter 231, 241: wire232, 242: winding case 250: extending motor 251: extending wire 251′:wire groove 260: collapsing motor 260′: tension reel 261: collapsingwire 300: rotational part 301: shaft 310: housing 320: rotational motor330: bearing 400: signboard 500: control part

DESCRIPTION OF SPECIFIC EMBODIMENTS

The advantages, features and aspects of the invention will becomeapparent from the following description of the embodiments withreference to the accompanying drawings, which is set forth hereinafter.

The present invention is provided with a multi-stage collapsible blindpart. The blind part is rotatably configured so as to function as ashutter and an advertising board when it is rotated downwardly and tofunction as a signboard when it is rotated upwardly.

A multi-purpose shading device of the present invention includes acollapsible blind part 100, a driving part 200 which collapses orextends the blind part 100, and a rotational part 300 which upwardly ordownwardly rotates the blind part 100 at a certain angle. Themulti-purpose shading device further includes a control part 500 whichcontrols the driving part 200/rotational part 300 and a signboard 400installed at the blind part 100.

FIG. 1 is a view showing the configuration of a multi-purpose shadingdevice according to an embodiment of the present invention, and FIG. 2is an exploded perspective view of the multi-purpose shading deviceaccording to the embodiment of the present invention.

The blind part 100 is comprised of a plurality of blind plates. A rearside blind plate is guided by a fore-end blind plate, and thus the rearside blind plate can be collapsed or extended along the front side blindplate. Therefore, the blind plates are formed into a multi-stage type.Herein, the plurality of blind plates are configured to be collapsed andextended in a telescopic type. In the telescopic blind part 100, therear side blind plates are slid with the fore-end blind plate so as tobe collapsed or extended. That is, the rear side blind plates areprovided so as to be slid with the fore-end blind plate, thereby beingcollapsed or extended. The blind plates may be formed into a two or morestage type. In case of a 3-stage type according to the embodiment shownin the drawings, a second blind plate 120 is disposed in a first blindplate 110 so as to be collapsible and extendable, and a third blind 130is also disposed in the second blind plate 120 so as to be collapsibleand extendable. The number of blind plates may be increased or reducedaccording to a surface area to be shielded.

In other words, according to the configuration of the 3-stage telescopicblind part 100, the second blind plate 120 is configured to be guidedinto the first blind plate 110 and thus to be collapsed and extended,and the third blind plate 130 is also configured to be guided into thesecond blind plate 120 and thus to be collapsed and extended.

That is, the second blind plate 120 is installed so as to be guided intothe first blind plate 110 and to be inserted into or withdrawn from thefirst blind plate 110, and the third blind plate 130 is installed so asto be guided into the second blind plate 120 and to be inserted into orwithdrawn from the second blind plate 120. Herein, the second and thirdblind plates 120 and 130 which are respectively inserted into andwithdrawn from the first and second blind plates 110 and 120 areconfigured to be not separated from the first and second blind plates110 and 120. As shown in FIG. 3, the second and third blind plates 120and 130 may be formed with a flange portion and protruded portion inorder to prevent the separation.

In the blind part 100, as described above, a shielding surface area ofthe blind part 100 can be regulated by the inserting and withdrawing ofthe plurality of the blind plates. The blind plates may be formed of alight metal, a light PE resin or the like.

Further, the blind part 100 may be configured to be controlled manually.However, in the present invention, the blind part 100 may be alsoconfigured to be controlled automatically as shown in FIG. 2.

The driving part 200 functions to automatically insert or withdraw themulti-stage blind plates, thereby collapsing or extending the blind part100.

Herein, the driving part 200 may be implemented in the form of variousembodiments. In one of the embodiments, as shown in FIG. 2, the drivingpart 200 includes a rack 220 which is disposed at one side of the blindpart 100 so that one end of the rack 220 is coupled to the third blindplate 130, a pinion 221 which linearly drive the rack 220, and a drivingmotor 210 which rotates the pinion 221. Herein, the driving motor 210can be rotated normally and reversely. If the pinion 221 is rotated bynormal or reverse rotation of the driving motor 210, the rack 220 islinearly moved by the rotation of the pinion 221. Thus, the third blindplate 130 coupled to the rack 220 is also moved together with the rack220, and the second and third blind plates 120 and 130 are respectivelyguided to the first and second blind plates 110 and 120 so as to becollapsed and extended.

The first, second and third blind plates 110, 120 and 130 of the presentinvention has a desired thickness in order to function as a shutter anda signboard to be described later. And each internal portion of thefirst and second blind plates 110 and 120 is hollowed so that the secondthird plates 120 and 130 are respectively slid therein.

The operation of the driving part 200 including the pinion 221 and therack 220 is carried out by the linear movement of the rack 220. Herein,it is necessary to secure a space in which the rack 220 can be movedback.

FIG. 4 is an exploded perspective view of a multi-purpose shading deviceaccording to another embodiment of the present invention.

In the embodiment, a collapsible supporter 230 may be provided insteadof the rack 220 and pinion 221. This configuration is to reducelimitation on installation of the multi-purpose shading device.

The collapsible supporter 230 of the embodiment is disposed at one sideof the blind part 100 so that one end of the collapsible supporter 230is coupled to the third blind plate 130. The collapsible supporter 230is formed into a multi-stage type so as to be collapsed and extended. Awire 231 is provided in the collapsible supporter 230. One end of thewire 231 is fixed to a fore-end portion of the collapsible supporter230, and the other end thereof is wound in a winding case 232.

The winding case 232 includes a drum (not shown) on which the wire 231is wound. The drum is normally or reversely rotated by the driving motor210 so that the wire 231 is wound or released. That is, if the drum ofthe winding case 232 is rotated by rotation of the driving motor 210, alength of the wire 231 is varied, and thus a length of the collapsiblesupporter 230 is also changed. Therefore, the third blind plate 130 isinserted into the second blind plate 120, thereby changing the range ofshielding the sun or shutting out the rain. Herein, in order to guidethe wire 231, the collapsible supporter 230 has the similarconfiguration to a telescopic antenna. In this configuration, thedriving motor 210 can be also rotated normally and reversely. Thewinding case 232 is driven by the driving motor 210 so that the wire 231is wound or released.

Further, the driving part 200 including the driving motor 210, thewinding case 232, the wire 231 and the collapsible supporter 230 can bedisposed at only one side of the blind part 100. However, in suchconfiguration, while the blind part 100 is collapsed, the collapsingoperation may be disturbed by a balance difference between left andright sides of each blind plate. In order to solve the problem, one pairof the driving parts 200 may be provided at both sides of the blind part100. Further, the driving part 200 may be also disposed at the front andrear sides of the blind part 100 as well as the side thereof.

However, the driving part 200 comprised of the driving motor 210, thewinding case 232, the wire 231 and the collapsible supporter 230 isoperated in the state that it is exposed to an outside of the blind part100. Therefore, external impact may be directly applied to the drivingpart 200. That is, the driving part 200 may be decolorized or corrodedby the influence of the sun, the rain or the like. In addition, it isfeared that a safety accident will occur while the driving part 200 isoperated.

Hereinafter, the configuration of the driving part 200 for solving theabove-mentioned problems will be described.

FIG. 5 is a front view of a multi-purpose shading device according toyet another embodiment of the present invention. The driving part 200 ofthe embodiment is provided with a collapsible supporter that a wire isdisposed therein, thereby increasing its durability and stability.

In the configuration, the collapsible supporter 240 is formed into amulti-stage type so as to be collapsed and extended, and disposed in theblind plates 110, 120 and 130. One end of the collapsible supporter 240is coupled to the third blind plate 130, and the other end thereof iscoupled to a winding case 242. Further, a wire 241 is provided in thecollapsible supporter 240. One end of the wire 241 is fixed to afore-end portion of the collapsible supporter 240, and the other endthereof is wound in the winding case 242. Furthermore, the winding case242 includes a drum (not shown) on which the wire 241 is wound. The wire241 is wound or released by rotation of the drum. Herein, the drum ofthe winding case 242 is normally or reversely rotated by a driving motor210. Rotational force of the driving motor 210 is directly applied tothe winding case 242 so as to rotate the drum of the winding case 242.However, a driving gear 211 and a driven gear 212 may be providedbetween the winding case 242 and the driving motor 210 so that therotational torque of the driving motor 210 is increased and thentransmitted to the winding case 242.

Further, the above-mentioned configuration is provided in plural so asto be disposed in left and right sides of the blind part 100. Therefore,it can be prevented that the collapsing operation is disturbed by thebalance difference between left and right sides of each blind plate. Inthis case, the driving motor 210 may be also provided in pluralcorresponding to the number of winding cases 242. However, if eachdriving part 200 is operated by the multiple driving motors 210,rotational deviation may be occurred by fabrication tolerance of eachdriving motor 210, and thus the collapsing operation of the blind part100 may be disturbed by the balance difference between left and rightsides of each blind plate due to the rotational deviation of eachdriving motor 210. Therefore, it is preferable that the pluralitywinding cases 242 are operated by a single driving motor 210. To thisend, the rotational force of the signal driving motor 210 may betransmitted to the winding cases 242 through a winding shaft 243.Herein, the winding shaft 243 may be replaced by a belt or other powertransmission means.

Herein, the configuration of the driving part 200 operated by the singledriving motor 210 will be described. The rotational force of the signaldriving motor 210 is transmitted to the plurality of the winding cases242 through the winding shaft 243. The winding cases 242 are installedon the winding shaft 243. The collapsible supporter in which the wire241 is installed is coupled to each winding case 242. That is, thewinding cases 242 are driven by the single driving motor 210. Therefore,it can be minimized that the collapsing operation is disturbed by thebalance difference between left and right sides of each blind plate.Herein, a driving gear 211 is installed on a rotational shaft of thedriving motor 210, and a driven gear 212 is installed on the windingshaft 243. The rotational force of the driving motor 210 transmitted tothe winding case 242 can be controlled by a gear ratio of the drivinggear 211 and the driven gear 212. And the driving motor 210 iscontrolled by the control part 500.

By such configuration, the blind part 100 can be smoothly collapsed orextended by controlling the normal and reverse rotation of the drivingmotor 210, thereby controlling the range of shielding the sun orshutting out the rain.

Next, the configuration for rotating the blind part 100 at a desiredangle will be described.

In the present invention, the blind part 100 is configured to berotatable. To this end, it is necessary for a shaft for rotating thefirst blind part 110. This shaft functions to rotate the whole blindparts, i.e., the blind part 100 by rotating the first blind part 110.This operation can be achieved by a shaft 301 which is disposed at arear side of the first blind part 110. In other words, the rotationalpart 300 rotates the blind part 110 at a desired angle. This can beachieved by rotating the shaft 301 coupled with the first blind part110.

The rotational part 300 includes a housing 310 to which the shaft 301 isrotatably coupled, and a rotational motor 320 which rotates the shaft301. Therefore, the rotational force of the rotational motor 320 can betransmitted to the shaft 301. In case of the configuration that therotational force of the rotational motor 320 is directly transmitted tothe shaft 301, the rotational motor 320 may be overloaded. Therefore, adriving gear 321 is installed on a rotational shaft of the driving motor320, and a driven gear 322 is installed on the shaft 301. The drivinggear 321 is engaged with the driven gear 322 so that the rotationalforce of the rotational motor 320 can be transmitted to the shaft 301. Abearing 330 may be interposed between the shaft 301 and the housing 310in order to smoothly rotate the shaft 301. Further, the driving shaft321 and driven shaft 322 may be replaced with a driving pulley and adriven pulley, and the driving pulley and driven pulley may be connectedthrough a belt.

In case that the multi-purpose shading device of the present inventionis disposed at an outer wall of a building, the blind part 100 rotatedby the rotational motor 310 may be configured to be rotated upwardlywithin a range of an angle of 90° and also rotated downwardly within arange of an angle of 90°.

FIG. 6 is a view showing the operation of the multi-purpose shadingdevice according to the embodiment of the present invention. Thesignboard 400 can be provided on a 1-1^(st) surface 111 of the firstblind plate which is exposed to the outside by upward rotation of theblind part 100.

Further, an advertising board can be provided on at least one of a1-2^(nd) surface 112, 2-2^(nd) surface 122 and 3-2^(nd) surface 132which is exposed to the outside by downward rotation of the blind part100.

More detailedly, as shown in FIG. 6, in order for the multi-purposeshading device of the present invention to function as a shutter, theblind part 100 is rotated downwardly, and the first, second and thirdblind plates 110, 120 and 130 of the blind part 100 are extended. Inother words, when the rotational motor 310 is driven so that the blindpart 100 is parallel with an outer wall of a building, and then thefirst, second and third blind plates 110, 120 and 130 of the blind part100 are extended, the blind part 100 can functions as the shutter forprotecting a show window, a wall, a door or the like.

Herein, the advertising board can be provided at the 1-2^(nd) surface112, 2-2^(nd) surface 122 and 3-2^(nd) surface 132 which are exposed tothe outside. Therefore, it is possible to promote stores and goods tocustomers. The advertising board formed at each surface may be a papersheet which can be facilely attached and detached.

Further, in order for the multi-purpose shading device of the presentinvention to function as the signboard, the blind part 100 is rotateddownwardly so that the blind part 100 is parallel with an outer wall ofa building, and the 1-1^(st) surface 111 is exposed to the outside. Thesignboard is provided at the exposed surface. The signboard 400 may beformed by directly marking a shop name. Otherwise, the signboard 400 maybe configured to emit light when power is applied.

Meanwhile, the control part 500 functions to control the driving part200 and the rotational part 300. The control part 500 may include abutton for normally and reversely rotating the driving motor 500, abutton for normally and reversely rotating the rotational motor 500, orthe like. Further, a locking unit for preventing an operation of a thirdparty may be provided.

FIGS. 8 a and 8 b are a side view and a cross-sectional view of theblind part and the driving part according to one embodiment of thepresent invention, and FIG. 9 is a side view showing the operationthereof.

Hereinafter, a direction that blind part is extended is called as a“front side”, and a direction that blind part is collapsed is called asa “rear side”. In the blind part 100, a rear side blind part can beinserted in a fore-end blind plate and also slid from the fore-end blindplate. This configuration may be formed into a two or more stage type.In case of a 3-stage type, the blind part 100 includes a first blindplate 150, a second blind plate 160 and a third blind plate 170.

The first blind part 150 is provided with a first roller 155 which isdisposed at an inner front side thereof. The second blind part 160 isslidably disposed on the first blind plate 150. The second blind part160 is provided with a second roller 165 which is disposed at an innerfront side thereof and a third roller 166 which is disposed at an innerrear side thereof. The third blind part 170 is slidably disposed on thesecond blind plate 160. The third blind part 170 is provided with afourth roller 175 which is disposed at an inner rear side thereof. Thesignboard 400 is provided on a 1-1^(st) surface 151 of the first blindplate 150.

As described above, the driving part 200 can be driven by two wires anda motor on which each wire is wound. An extending wire 251 is to extendthe blind part 100, and a collapsing wire 261 is to collapse the blindpart 100.

The extending wire 251 is fixed to an inner front end of the third blindplate 170, wound on the fourth roller 175 and then guided to theoutside. Then, the extending wire 251 is wound again on the secondroller 165 of the second blind plate 160, led into the second blindplate 160, wound on the third roller 166 and then guided to the outside.And the extending wire 251 is wound again on the first roller 155 of thefirst blind plate 150, led to the first blind plate 150, guided to arear side and the led to the rear side of the first blind plate 150.Then, the extending wire 251 is wound on an extending motor 250.

Further, one end of the collapsing wire 261 is connected to the rearside of the third blind plate 170, and the other end thereof is wound ona collapsing motor 260.

Herein, the extending motor 250 and collapsing motor 260 are controlledby the control part 500.

In the above-mentioned configuration, the extending wire 251 is led fromthe lower portion of the third blind plate 170 to the front side of thesecond blind plate 160, guided to the rear side of the second blindplate 160, and then guided again to the front side of the first blindplate 150. Therefore, the extending wire 251 is surface-contacted witheach of the first, second and third blind plates 150, 160 and 170.Therefore, a wire groove 251′ through which the extending wire 251 ledto the outside is guided is formed in an upper surface of the secondblind plate 160.

In addition, in order for the blind plates 150, 160, 170 to be slidablysurface-contacted with each other, the second and third blind plates 160and 170 are respectively formed with a runner 181 protruded to the lowerside thereof. And the first and second blind plates 150 and 160 arerespectively formed with a rail 182 for guiding movement of the runner181.

Hereinafter, the operation thereof will be described.

Firstly, in the state that the blind plates 150, 160 and 170 arecollapsed, the extending motor 250 is driven by the control part 500.While a length of the extending wire 251 wound on the extending motor250 is reduced, the extending wire 251 is slid to the front sides of thesecond and third blind plates 160 and 170. Thus, the first, the secondand third blind plates 150, 160 and 170 are extended to perform theshading function.

And the first blind plate 150 is coupled to the shaft 301, and the shaft301 is rotated by the shaft 301. That is, the shaft 301 is configured tobe rotated upwardly and downwardly by the rotational motor 320 of therotational part 300. Therefore, the blind part 100 can be rotateddownwardly by a control signal of the control part. If the blind part100 is extended while the blind part 100 is rotated downwardly, theblind part 100 functions as the shutter. And if the blind part 100 isextended while the blind part 100 is rotated upwardly, the blind part100 functions as the signboard.

Herein, the rotational part 300 also includes a shaft 301 which iscoupled to one side of the first blind part 150, a housing 310 to whichthe shaft 301 is rotatably coupled, and a rotational motor 320 whichnormally and reversely rotates the shaft 301 and housing 310. In casethat the rotational force of the rotational motor 320 is directlytransmitted to the shaft 301, the rotational motor 320 may beoverloaded. Therefore, as shown in FIG. 4, a driving gear 321 isinstalled on a rotational shaft of the driving motor 320, and a drivengear 322 is installed on the shaft 301. The driving gear 321 and drivengear 322 are engaged with each other. Therefore, the rotational torqueof the driving motor 320 is increased and then transmitted to the shaft301. Herein, a bearing 330 may be interposed between the shaft 301 andthe housing 310 in order to smoothly rotate the shaft 301. Further, thedriving shaft 321 and driven shaft 322 may be replaced with a drivingpulley and a driven pulley, and the driving pulley and driven pulley maybe connected through a belt.

Herein, an advertising board can be provided on at least one of a1-2^(nd) surface 152, 2-2^(nd) surface 162 and 3-2^(nd) surface 172which is exposed to the outside by downward rotation of the blind part100. The advertising board formed at each surface may be a paper sheetwhich can be facilely attached and detached.

While the second and third blind plates 160 and 170 are extended by theoperation of the extending motor 250, the collapsing motor 260 can berotated freely.

When the blind plates 150, 160 and 170 are collapsed, the extendingmotor 250 is controlled to be rotated freely, and the collapsing motor260 is operated by the control part 500. That is, if the collapsing wire261 is controlled to be wound on the collapsing motor 260, the extendedsecond and third blind plates 160 and 170 are slid to the rear side andthus collapsed. The extending motor 260 is controlled to be rotatedfreely so that the extending wire 251 is released.

As described above, when one of the extending motor 250 and collapsingmotor 260 is operated, the other one is controlled to be rotated freely.The collapsing motor 260 may be replaced with a tension reel 260′ drivenby the extending motor 250. In the tension reel 260′, tension isincreased, as the wound collapsing wire 261 is released, and if forceapplied to the released collapsing wire 261 is removed, the collapsingwire 261 is wound again.

In such configuration, there is an advantage in that a width of eachblind plate 150, 160, 170 can be set to be the same as each other.

According to the present invention, the blind part can be generally usedas an awning screen by extending the blind plates formed into themulti-stage type. The blind part can be used as a shutter when it isrotated downwardly, and also used as a signboard when it is rotatedupwardly. If necessary, the blind plates may be collapsed. In otherwords, the shading device of the present invention has multiplepurposes, thereby providing an economical advantage and also simplifyingits configuration.

Further, the blind part can function as an advertising board byproviding various advertisements on the outer surface thereof, while itis used as the shutter.

While the present invention has been described with respect to thespecific embodiments, it will be apparent to those skilled in the artthat various changes and modifications may be made without departingfrom the spirit and scope of the invention as defined in the followingclaims.

What is claimed is:
 1. A multi-purpose shading device comprising: ablind part 100 which is provide with a plurality of blind plates andformed into a multi-stage type so that a rear side blind plate is guidedto a fore-end side blind plate so as to be extended or collapsed alongthe fore-end side blind part; a driving part 200 which extends orcollapse the blind part 100; a rotational part 300 which rotates theblind part 100: and a control part 500 which controls the driving part200 and rotational part
 300. 2. The multi-purpose shading device ofclaim 1, wherein the blind part 100 comprises a first blind plate 110; asecond blind plate 120 which is guided to the first blind plate 110 soas to be inserted into or withdrawn from the first blind plate 110; anda third blind plate 130 which is guided to the second blind plate 120 soas to be inserted into or withdrawn from the second blind plate 120 3.The multi-purpose shading device of claim 1, wherein the blind part 100comprises a first blind plate 150 which is provided with a first roller155 disposed at an inner front side thereof; a second blind plate 160which is slidably disposed on the first blind plate 150 and providedwith a second roller 165 disposed at an inner front side thereof and athird roller 166 disposed at an inner rear side thereof; and a thirdblind plate 170 which is slidably disposed on the second blind plate 160and provided with a second roller 165 disposed at an inner rear sidethereof.
 4. The multi-purpose shading device of claim 2, wherein asignboard 400 is installed on a 1-1^(st) surface 111, 151 of the firstblind plate 110, 150 which is exposed to an outside when the blind part100 is moved upwardly.
 5. The multi-purpose shading device of claim 2,wherein an advertising board is provided on at least one of a a 1-2^(nd)surface 112, 152 of the first blind plate 110, 150 which is exposed toan outside when the blind part 100 is moved downwardly, a 2-2^(nd)surface 122, 162 of the second blind plate 120, 160 which is exposed toan outside when the blind part 100 is moved downwardly, and a 3-2^(nd)surface 132, 172 of the third blind plate 130, 170 which is exposed toan outside when the blind part 100 is moved downwardly.
 6. Themulti-purpose shading device of claim 2, wherein the driving part 200comprises a rack 220 which is disposed at one side of the blind part 100and of which one end is connected to the third blind plate 130; a pinion221 which is engaged with the rack 220; and a driving motor 210 whichnormally or reversely rotates the pinion
 221. 7. The multi-purposeshading device of claim 2, wherein the driving part 200 comprises acollapsible supporter 230 which is disposed at one side of the blindpart 100 and of which one end is connected with the third blind plate130 so as to be extended or collapsed in a multi-stage type; a wire 231which is disposed in the collapsible supporter 230 and of which one endis fixed to a fore-end side supporter of the collapsible supporter 230and the other end is wound in a winding case 232; and a driving motor210 which is normally or reversely rotated so as to drive the windingcase 232 and thus to release or wind the wire
 231. 8. The multi-purposeshading device of claim 2, wherein the driving part 200 comprises acollapsible supporter 240 which is disposed in the blind part 100 and ofwhich one end is connected with the third blind plate 130 so as to beextended or collapsed in a multi-stage type; a wire 241 which isdisposed in the collapsible supporter 240 and of which one end is fixedto a fore-end side supporter of the collapsible supporter 240 and theother end is wound in a winding case 242; and a driving motor 210 whichis normally or reversely rotated so as to drive the winding case 242 andthus to release or wind the wire
 241. 9. The multi-purpose shadingdevice of claim 8, wherein rotational force of the driving motor 210 istransmitted to the winding case 242 through a winding shaft 243, andmultiple winding cases 242 are installed on the winding shaft 243, andeach winding case 242 is provided the collapsible supporter 240 in whichthe wire 241 is disposed.
 10. The multi-purpose shading device of claim2, wherein the rotational part 300 comprises a shaft 301 which iscoupled to one side of the first blind plate 110, 150; a housing 310 towhich the shaft 301 is rotatably coupled; and a rotational motor 320which normally or reversely rotates the shaft 301.